more questions about virtual villagers

[crzwith4]

 :OO
ok, got the gong keep ringing it but my silly question is what is the most elders u can have? i have 50 and cant seem to get any more. Does the map expand?  can the villagers go beyond what i see at some point in the game or is basically the game over when i have all 16 puzzles, all the gong and all the collectables?  also besides the gong piece, is there something i should be doing with the ancient mosiac, can u build more buildings to have a bigger population?  CAN ANY ONE ANSWER THESE QUESTIONS, DOES ANY ONE KNOW?  HELP PLEASE!!! :OO